Catalytic, Nucleophilic Allylation of Aldehydes with Allyl Acetate
摘要:
A new catalytic allylation of aldehydes has been developed that employs allyl acetate as the allylating reagent. Under catalysis by ruthenium trichloride (3 mol %) in the presence of carbon monoxide (30 psi), water (1.5 equiv), and triethylamine (0.1 equiv), a wide range of aromatic, olefinic, and aliphatic aldehydes are efficiently allylated under mild conditions (70 degrees C, 24-48 h). The stoichiometric byproducts of this reaction are carbon dioxide and acetic acid.
Copper-Catalyzed Synthesis of Hindered Ethers from α-Bromo Carbonyl Compounds
作者:Zhe Zhou、Nicole Erin Behnke、László Kürti
DOI:10.1021/acs.orglett.8b02371
日期:2018.9.7
A catalytic method for the synthesis of sterically hindered ethers and thioethers from α-bromo carbonyl compounds and the corresponding nucleophiles using an inexpensive Cu(I) catalytic system is reported. This facile transformation takes place at ambient temperature and does not require the exclusion of air or moisture; thus, it is well-suited for the functionalization and derivatization of complex
Ionic liquids: a convenient solvent for environmentally friendly allylation reactions with tetraallylstannane
作者:Charles M Gordon、Adam McCluskey
DOI:10.1039/a903661j
日期:——
Ionic liquids based on the 1-butyl-3-methylimidazolium cation have been used as solvents for the preparation in good yield of homoallylic alcohols from tetraallylstannane and a range of aldehydes.
Electrochemical allylation reactions of carbonylcompounds using cathodes prepared from nitrogen-doped carbon (NDC)-incarcerated zinc catalysts have been developed. A range of aldehydes and ketones afforded the desired allylic alcohols in high yields with <10 mol % zinc leaching, and the heterogeneous nature of the active species was suggested. Compared with bulk zinc electrodes, NDC-stabilized zinc
A method of performing a chemical reaction includes reacting an allyl donor and a substrate in a reaction mixture, and forming a homoallylic alcohol in the reaction mixture. The substrate may be an aldehyde or a hemiacetal. The reaction mixture includes a ruthenium catalyst, carbon monoxide at a level of at least 1 equivalent relative to the substrate, and water at a level of at least 1 equivalent relative to the substrate, and an amine at a level of from 0 to 0.5 equivalent relative to the substrate. The reaction mixture may also include a halide, and the equivalents of the amine may be similar to those of the halide. The reacting includes maintaining the reaction mixture at a temperature of at least 40° C. The method may be catalytic in metal, environmentally benign, amenable to large-scale applications, and applicable to a wide range of substrates.